Why do you believe we do not have souls? The qualities of mercy, pity and forgiveness surpass machine thinking and basic instincts in human behavior every day in the people who haven’t debased themselves. I don’t believe those qualities reside in the neuron network we live in while alive.
It's not worth arguing over. The spiritually dead are already dead. I have become convinced that not all of those we see around us even have souls, but are rather like NPCs. Discernment is needed because there are also others that are demonically infested, and that's an entirely different breed.
If you have acknowledged your own soul then you have found a pearl of great value indeed.